Text message sent from my BB keeps appearing on the recipients phone

I'm new here and never thought I would need help from all you experts but I need HELP! lol

I sent a some texts to a friend of mine who does not have a BB from my BB Curve 8530 using the Crunch app.

I never save conversations in my message folder but do keep them "active" in the Crunch app.

He has deleted the messages off of his phone but since one particular text was sent to him by me and then deleted by him, it keeps popping up over and over on his phone. When it does, his phone freezes up and he has to pull his battery and then it's all good. He deletes the text and things are ok for a bit and then out of no where the text pops up again.

I have deleted all conversations from my Crunch app, deleted an MMS that I had saved in my phone from him. I think I have gotten rid of everything related to his number short of dropping him as a friend. lol JK

The carrier is for his Samsung Smile (I think that's what it is) is T-Mobile.

Has anyone had this happen to them or heard of anything remotely close to it? My friend is getting a little bit PO'd over it and is going to call T-mobile about it but it the meantime, I thought I would ask you here on the forum.